Message 13 of Message 15 of Thank you so much for your help!! You used the word “connected”, but did not say if you where sending and receiving messages. The remote interface can be selected from the front-panel only.

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Agilent E364X Series Power Supply

They both don’t work and as they are quite new, I am pretty sure they are not broken. Thanks and sorry again.

Try another USB to Serial. Do you have the correct combination of NULL modem, gender changer and cable?

Solved: Agilent EA – Page 2 – Discussion Forums – National Instruments

After I switched this setting on the device, I was able to set it via RS Is it an NI device or 3rd party? Message 14 of The remote interface can be selected from the front-panel only. Message 19 of ID Query Manually – 1.

So I began taking a closer look at the driver in Highlight Execution mode and started decoupling all the stuffs which made problems: LabVIEW could read back some number of bytes but still throw a labviea error.

Highlight execution mode showed me that problem lies in the initialize- Sub VI of the driver, which expects the ID of the power supply, and instead gets the ID from the adapter or nothing?


I am also quite sure that I chose e36488a right COM Port, as I always just plug it in and choose the one which newly appeared in the list. Thank you very much for the example for setting the default values myself. Message 18 of Message 12 of So my first fault were the front panel settings, and my second one was a missing NULL modem. We labviw that by having the software go out and hunt for the instrument on what ever comport it is on. The GPIB interface is selected when the power supply is shipped from the factory.

Did you say that you had labvisw communicating once that way? The current address is displayed momentarily on the front panel when you turn on the power supply. As soon as the problem is solved I will post the solution everywhere I asked for help.

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Just as a sanity check.

GPIB interface is selected when the e364a8 supply is shipped from the factory. I am however still not able to access the device via USB. Accepted by topic author Keksbold. I did not know this was not accepted and did not plan on playing someone off against someone else.


This seemed to work, but the next e36448a appeared when it tried to reset. I was planning to use the power supply in a dynamically controlled system, but unfortunately it always takes a few seconds to change the voltage level. If you are actually sending and receiving commands to the power supply, then what you have must be a NULL modem.

Power supply EA sample code – Discussion Forums – National Instruments

Actually I have to admit that I am just using a gender changer. Only one interface can be enabled at a time.

You used the word “connected”, but did not say if you where sending and receiving messages.

USB to RS converters are not all created equal.